Answer:
b) B and D and c) A and C
Step-by-step explanation:
The hypotheses would be:

(Right tailed test at 5% level)
Sample proportions are
Sample              A                 B                C                 D
Success            31               34               27               38
Proportion p     0.775         0.85            0.675          0.95
Std error
(sqrtpq/n)          0.066        0.056          0.074          0.034
p diff
p-0.75               0.025        0.10             - 0.075        0.20
Z stat                  
p diff/SE            0.0757       1.77                 1.01          5.80
p value               0.469       0.038             0.156       0.000001
we find that p value is more smaller than alpha, the more accurate the alternate hypothesis.
b) Only B and D provide against the null.  Because p <0.05
c) A and C provide no evidence for the alternative because p >0.05