46.
Your Answer is
Correct Answer is J
Explanation
Beginning in the summer of 1976 is used as an adverbial, which means that "Beginning in the summer of 1976, Baca led the creation of the longest mural" J is correct.
F item: Make this sentence appear two single sentences, wrong.
Item G: With a beginning in the summer table is accompanied, but a beginning refers to unclear, wrong.
Item H: for as a preposition means that "for" is not used in conjunction with the to do of the table, so it is wrong.