I believe the answer is: <span>intimacy-versus-isolation stage
</span>intimacy-versus-isolation stage happen when we enter the age of 19-40 years old. During this time, we will have to face internal conflict to either spend our time to find loving and intimate relationship with other people or to put ourself in solitary in order to pursue other things.
Answer: E - year only if non-OPEC nations, including Norway, Mexico, and Russia, trim output
Explanation: From the above question, we are looking for the best constructed sentence among the options given.
Looking through all the options, A and B with the phrase ...'but only if' is wrong.
Options C and D has some grammatical issues at the end of each statement which made them both not correct.
The only option we are left with is the option E which states that 'year only if non-OPEC nations, including Norway, Mexico, and Russia, trim output' is correct.