Select the correct answer.
Last year, the school library had a total of x books. Over the summer, the library acquired another 46 books and now has a total of 1,191 books. Which equation could be used to find x, the number of books the library had last year?
A) 46x = 1,191
B) x − 46 = 1,191
C) x + 46 = 1,191
D) 1,191 + x = 46