Answer:

Step-by-step explanation:
First write the problem out as a fraction.

Next see if there is a GCF
4:1,2,4
16:1,2,4,8,16
Finally divide the numerator and denomenator by the GCF

Answer:
B
Step-by-step explanation:
0<a2<a1 is the statement you're looking for.
Hope this helps! :)