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>
The sentence with the proper punctuation is: <span>Peanuts, according to Dr. Campbell, are a healthful substitute to potato chips. The sentence is punctuated with commas to stress certain points of the message being conveyed. The subject and the direct object are being emphasized in this sentence.</span>
Answer: Before about week 8 of pregnancy, a doctor may refer to the fetus as an embryo. The heart of an embryo starts to beat from around 5–6 weeks of pregnancy. Also, it may be possible to see the first visible sign of the embryo, known as the fetal pole, at this stage.
A. help keep joints flexible
