If it says The entire ride takes them about 20 minutes. What is it is it a simple subject or a complete subject or a simple predicate or a complete predicate

Complete subject.

Explanation:

Subject is described as the word or word group(usually a noun phrase) that is dealt with. It is described as the doer that performs the action in the sentence.   A complete subject is demonstrated as all of the words(noun along with the other modifiers) that is performing the action or is being discussed in the sentence.

In the given sentence, 'the entire ride' exemplify the 'complete subject' as it consists of the noun 'ride' along with the determiner 'the' and modifier 'entire' attached to it. These words together function as the subject of the sentence which is being discussed in the sentence. Thus, it is functioning as the 'complete subject.'

i believe that the answer is b! i hope i out!