A group of researchers believes that a new workout routine helps reduce blood pressure levels. In a study with $18$ participants:
$13$ had lower blood pressure after the program
$4$ had higher blood pressure
$1$ showed no change
Use a left-tailed sign test at $\alpha =0.05$. What is your decision, and what does it mean in context?

Fail to reject $H_0:$ there is insufficient evidence to support the claim.

Reject $H_0:$ there is sufficient evidence to support the claim that the workout routine reduces blood pressure.

Fail to reject $H_0:$ the workout routine significantly increases blood pressure.

Reject $H_0:$ the workout routine has no effect on blood pressure.