What is the sign of the product (-)(1)?
select one:
a. positive, because the products (-) and (-5)(1) are negative, and the product of two negative numbers is positive
b. positive, because the products (-) and (-5)(1) are positive, and the product of two positive numbers is positive
c. negative, because the product (-) 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