Rearrange the following sentences in the proper sequence to form a meaningful paragraph; then answer the questions given below them.

(A) The government has therefore employed authorities to conduct fumigations, as the situation continues to escalate.
(B) Despite efforts to contain the situation, the bed bugs have infested public transport, popular tourist destinations, and even airports.
(C) Paris, a global tourist destination, has recently faced a troubling resurgence of bed bugs across various neighborhoods and popular attractions in the city.
(D) This outbreak has raised concerns not only among residents but also tourists, many of whom worry that the pests could travel with them back to their countries.
(E) Experts suggest that international travel and dense urban environments have facilitated the rapid spread of this infestation.
(F) Furthermore, bed bugs have become a common sight in metros and airports, making control measures even more challenging.

Which of the following should be the FIRST sentence after rearrangement?

The correct answer is C.

To determine the correct first sentence after rearrangement, let us analyze the thematic progression and logical sequence of the given statements:

1. Sentence (C) introduces the main topic of the paragraph: Paris facing a troubling resurgence of bed bugs across neighborhoods and popular attractions. Since it introduces the subject matter, location, and key issue without relying on prior context, sentence (C) acts as the opening statement (FIRST sentence).

2. Sentence (B) builds upon (C) by detailing how, despite efforts to contain it, the infestation has spread to public transport, tourist destinations, and airports.

3. Sentence (F) adds further emphasis on public transport and airports ("Furthermore, bed bugs have become a common sight...").

4. Sentence (D) discusses the widespread concern raised by this outbreak among residents and international tourists.

5. Sentence (E) explains the cause/factors contributing to this rapid spread (international travel and dense urban environments).

6. Sentence (A) concludes the paragraph by describing the government's response to the escalating situation (employing authorities to conduct fumigations).

Thus, the logical and coherent order of the sentences is C - B - F - D - E - A.

Therefore, the FIRST sentence after rearrangement is C.