ENG II-Help Please

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I took ENG 101 in college. Now I must obtain 3 more credits for COSC writing requirement. I have limited my choices to:

TECEP ENG 102 exam
DSST Technical Writing
CLEP College Composition

All three exams require an essay for COSC. Which of these is the least difficult? If I duplicate ENG101 thats ok. My goal is the acquisition of required general education credits in the least amount of time thus prompting my question regarding difficulty.

Thank you!