Which of the following sentences is grammatically correct?

Question

Quizplus · Accepted Answer

Every sentence must contain a subject and predicate.
The subject of a sentence is the person, place, thing, or idea that is doing or being something. You can find the subject of a sentence if you can find the verb. Ask the question, "Who or what is performing the action in the sentence?" and the answer to that question is the subject.
The predicate is the part of a sentence or clause containing a verb and stating something about the subject.
"To commemorate her mother's legacy, Jennifer is giving a speech at the auditorium this evening." is correct because the subject is "Jennifer" and the predicate is "is giving a speech at the auditorium this evening."
To commemorate her mother's legacy, Jennifer giving a speech at the auditorium this evening. is not grammatically correct. The verb "giving" used in this context needs a helping verb, so it is used incorrectly here.
Jennifer is giving a speech at the auditorium this evening. To commemorate her mother's legacy. is not grammatically correct because the placement of the period results in the second half being an incomplete sentence.
Because she wants to commemorate her mother's legacy and to give a speech at the auditorium this evening. is not grammatically correct because the sentence begins with "because."

Which of the Following Sentences Is Grammatically Correct