Some one had the same question as you so here is someone answer.
Hi the answer to this problem is C
The answer is D (8 to 12)
While doing upper-body exercise routine, fatigue of target muscles can be safely achieved within<span> the short time-frame of about 1.5 minutes (the time-frame for anaerobic pathways) by simply performing 8 to 12 </span>repetitions<span> at a moderate movement speed.</span>
Explanation:
she will also follow her friends and do whatever they do. teenage thinks that they are the best and they can do whatever to be best infront of others