Directions (101-102): In each of the following questions, a sentence has been divided into four phrases. These phrases may or may not have been placed in their correct positions. Identify the correct rearrangement of the phrases to make the sentence grammatically correct and contextually meaningful, and mark that option as your answer.

mystery and wonder, with billions of (A)/ a burning beacon of light in the vastness of space (B)/ the universe is an endless expanse of (C)/ galaxies and trillions of stars, each one (D)

To find the correct rearrangement of the phrases, let us analyze the grammatical and contextual connections between them:

1. Phrase (C): "the universe is an endless expanse of" introduces the subject ("the universe") and ends with the preposition "of", which needs a noun or a noun phrase to follow it.
2. Phrase (A): "mystery and wonder, with billions of" starts with the nouns "mystery and wonder" that fit perfectly after "expanse of" in (C). So, we get the link C ⇒ A ("the universe is an endless expanse of mystery and wonder, with billions of...").
3. Phrase (D): "galaxies and trillions of stars, each one" starts with the noun "galaxies", which perfectly completes the phrase "billions of" at the end of (A). This gives us the link A ⇒ D ("billions of galaxies and trillions of stars, each one...").
4. Phrase (B): "a burning beacon of light in the vastness of space" logically and grammatically follows "each one" in (D), describing "each one" of the stars. This gives us the final link D ⇒ B ("each one a burning beacon of light in the vastness of space").

Combining all these connections in order, the correct sequence is CADB.

Therefore, the complete and coherent sentence is: "The universe is an endless expanse of mystery and wonder, with billions of galaxies and trillions of stars, each one a burning beacon of light in the vastness of space."

Hence, the correct option is CADB.