Labor shortages may delay and drive up the cost of product development.

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 ~
The correct answer is:
"Psalm" suggests that the passage of time cannot defeat the soul, while "Auspex" indicates that it can.
"A Psalm of Life", usually subtitled "What the Heart of the Young Man Said to the Psalmist", is a poem composed by American writer Henry Wadsworth Longfellow.
James Russell Lowell (1819-1891) was an American poet and diplomat.
They both were part of the Fireside Poets, a group of New England writers among the first American poets who competed with British poets.
This short poem has End Rhymes, meaning that the rhymes are located at the end of each line. In this case, 'shine' and 'mine' rhyme and are located at the ends of each line.
Answer:
foolishly believed thoughtfully guessed
Explanation: