What is the sign of the product (-7)(-2)(-5)(1)?
Select one:
a. Positive, because the products (-7)(-2) and (-5)(1) are negative, and the product of two negative numbers is positive
b. Positive, because the products (-7)(-2) and (-5)(1) are positive, and the product of two positive numbers is positive
c. Negative, because the product (-7)(-2) is positive, and the product (-5)(1) is negative and the product of a positive and a negative number is negative
d. Negative, because the products (-7) (-2) and (-5) (1) are negative and the product of two negative numbers is negative