Question

Select the indefinite article that completes the following sentence. He picked up _____ piece of fruit out of the bowl and bit into it.
A. a
B.the
C. an

Answer 1

The bc an is plural meaning there is more than one and you just got 1 of many and a sounds wrong so "The" is the answer

Answer 2

The correct option is A. He picked up a piece of fruit out of the bowl and bit into it.

A is an indefinite article as well as AN. A is the correct indefinete article for this sentence because when the following word, usually a noun, begins with a consonant, the suitable article employed is "A". "An" will be used in the case of a word which first letter is a vocal.

"The" cannot be the correct answer as it is not an indefinite article, It is a DEFINITE article, which consists on an article to refer to a particular object that had been already mentioned.