Question

select the conjunction that best links the ideas below. monkey d. luffy accidentally broke his alarm clock; however, he asked me to wake him up for school.

Explanation:

The sentence shows a contrast: Luffy broke his alarm clock (a problem) but then asked for help to wake up (a solution/next action). "However" is a conjunctive adverb used to show contrast between two independent clauses, which fits the relationship here (breaking the clock vs. asking for a wake - up).

Answer:

however