Kevin's history grade will be determined by the average of 4 tests. he received a 76, an 85, and a 74 on the first 3 tests. he needs to get a average of at least 80 to receive a b. which inequality can be used to find g, the minimum grade kevin must make on the fourth test to receive a b in history? a. 76+85+74+g/4_> 80b. 76+85+74-g/3_> 80c.76+85+74-g/4_> 80d. 76+85+75+g/3_> 80