
If two similar waves are traveling in the same medium, then they have same wave velocity. so we can infer that

Now, as per the formula ~ we know that :

Now, we can write it as :

And it's also given that frequency of wave A is 3 times that of frequency of wave B.
So, let's add the relation to our equation ~



So, choice C is correct ~
"<span>c. With all of the death and destruction from the war, Americans wanted to escape into an ideal world" is the best option, since America was devastated from the massive amounts of violence and wanted a "release".</span>
Answer:
Esperanza feels guilt because she believes that she is the cause of her aunt's death.
I wish I could have a chance of study abroad this summer.
