Answer:
She (bought) the book at the store.
Step-by-step explanation:
A simple predicate is a verb or the action that the subject does. It is the main verb in the sentence that tells us what the subject does or what is the action done.
Among the given options, the sentence that contains or has the simple predicate is the second sentence. Here, the subject "she" buys a book, with the verb "bought" being the main verb and does not contain any emphasis or modifiers in it.
So, the word "bought" within the parenthesis is the simple predicate.
Thus, the correct answer is the second sentence.