We have a test of hypothesis for the mean.
The significance level is α = 0.1 and the result of the test gives a P-value = 0.0073.
As the P-value is less than the significance level, the result is significant and there is enough statistical evidence to reject the null hypothesis H0.
This matches the text from Option B: "Reject H0 because the P-value is less than or equal to α".
The original claim, as it is expressed with an equal sign, is referred to the null hypothesis. The alternative hypothesis always claim that certain parameter is different (or greater or smaller) than certain value, while the null hypothesis always include the equal sign.
As we have just reject the null hypothesis, we can conclude that "there is sufficient evidence to warrant rejection of the claim that the mean pulse rate of the group of adult males is 69 bpm". This correspond to Option C.
Answer:
a) Option B
b) Option C