On an introductory statistics exam, students are asked to test the claim that a coin is not fair. They are required to do this using P-value approach and the 95% confidence interval and cross check their results. They are asked to set alpha – 0.05

Sam calculates the P value to be 0.02 and he rejects the null using the p-value approach. 
He also calculates the confidence interval to be fro, 0.45 to 0.55 and fails to rejects the null using the 95% confidence interval. 
How would you grade sams paper?
a. Sam should not be given any credit because his findings are contradictory 
B. Sam should be given partial credit because he found the coin to be fair
C .sam should get full credit because his p value is less than 0.05 and is rejecting the null. 
d. Sam should be given full credit because he calculated both the p value and the confidence interval.