Which of the following is an example of a simple sentence?

A simple sentence is defined as a sentence that contains a subject and a verb and expresses a complete thought. It typically has just one independent clause and does not include any dependent clauses.

In the given choices, the first option represents a simple sentence because it features a single independent clause: "The young boy in the white T shirt had cried for 10 minutes." This clause conveys a complete idea by stating what the subject (the young boy) did (cried) and includes relevant information, such as the duration of the action (for 10 minutes). Although it includes additional descriptive elements, it does not contain conjunctions or other clauses that would complicate it into a compound or complex structure.

The other options consist of sentences that contain either coordinating conjunctions or subordinating conjunctions, which introduce additional clauses. These constructions make them compound or complex sentences rather than simple sentences. In contrast, the selected option remains straightforward and undiluted, successfully meeting the criteria for a simple sentence.