(A) slowly drifting away
(B) from Earth at about
(C) the Moon is
(D) 1.5 inches per year

The following question gives a sentence which has been divided into four parts which may not be in their correct order of narrative. The sentence is then followed by five options, one of which gives the sequence of the rearranged parts to make the sentence meaningful. Choose the option which gives the correct sequence of the parts. If the sentence is already arranged in the correct sequence, mark option " No rearrangement required " as the answer.

The correct option is CABD.

To find the correct meaningful sequence, let us analyze the given sentence fragments and their grammatical connections:

1. Part (C): "the Moon is" introduces the main subject ("the Moon") followed by the linking verb "is". This serves as a natural beginning to the sentence.
2. Part (A): "slowly drifting away" provides the continuous verb phrase describing what the Moon is doing.
3. Part (B): "from Earth at about" specifies the prepositions and reference point indicating the direction and reference for the movement.
4. Part (D): "1.5 inches per year" completes the sentence by specifying the rate of movement.

Putting these parts together in the order C → A → B → D yields the grammatically complete and meaningful sentence:
"The Moon is slowly drifting away from Earth at about 1.5 inches per year."

Therefore, the correct sequence of the rearranged parts is CABD.