Angela's average for six math tests is 87. on her first four tests she had scores of 93, 87,82, and 86. on her last test, she scored four points lower than she did on her fifth test. What scores did Angela receive on her fifth and sixth tests?
A.fifth test=90; sixth test = 86
B. fifth test =89; sixth test= 85
C. fifth test =85; sixth test = 81
D. fifth test= 85; sixth test= 89