Answer:
If the underlined word is precursor, the answer would be preceding.
Explanation:
Using clues around the word, I was able to figure out that Algebra comes before Calculus. Â Looking at the choices, the only one that would fit is preceding because the others' definitions don't mean anything close to precursor. Â Precursor means to come before another thing that is close, if not, the same. Â If it's not preceding, it would be introduction.
