1 point Which expression is a factor of \( x^{2}+3 x-40 ? \) A. \( (x-4) \) B. \( (x-5) \) C. \( (x-8) \) D. \( (x-10) \)

Step 1 ：Find the factors of -40 such that their sum is 3.

Step 2 ：The factors are 8 and -5.

Step 3 ：Factor the quadratic: (x + 8)(x - 5)