The College Board discovered a mistake! All of their tests administered in 2017 were scored 50 points lower than they should have been. Assuming they have a vector called SAT.2017 that includes all test scores, how would they add 50 points to each score in the vector? a) SAT.2017 + 50
b) SAT.2017 <- add(50)
c) sum(SAT,50)
d) sum(SAT+50)