Approximately 70% of statistics students do their homework in time for it to be collected and graded. Each student does homework independently. In a statistics class of 50 students, what R code would compute the probability that at least 40 will do their homework on time? Students are selected randomly.
A. 1 - pbinom(39, 50, 0.70)
B. pbinom(40, 50, 0.30)
C. 1 - pbinom(40, 50, 0.70)
D. pbinom(39, 50, 0.30)