Which sentence ending corrects the sentence fragment below? after i play soccer with my friends or watch football to get some exercise my legs ache

"My legs ache"

It's ends the fragment in a way that completes the action. All of the other ones would not complete the sentence.this makes it a complete thoughts

Okay, biology isn't exactly my strongest subject (it never has been), but i'm pretty sure the answer is nucleotides. dna is made up of nucleotides. each nucleotide contains a phosphate group, a sugar group, and a nitrogen base. there are four different nitrogen bases: adenine (a), thymine (t), guanine (g), and cytosine (c). a always pairs with t, and g always pairs with c.