Answer:
A. the velocity of the wave increases
Explanation:
from the mathematical formular
[tex]f= \frac{v}{l} =\frac{1}{T}=\sqrt{\frac{T}{k} }[/tex]
where v is the velocity, f is frequency, T is tension, l is length or wavlenght and k is constant.
from the expression you can see that when the tension increases, the velocity will also increase.
for amplitude, tension has no effect on it.
