the is a definite article meaning that you cannot use it
"an" can only be used before words beginning with vowels
therefore the answer is" a"
Hello~
The answer to your question is E.
All of these traits make restriction enzymes useful.
~Hope this Helps!~
Coal, petroleum, and natural gas are all fossil fuels. Coal is of plant origin while petroleum and natural gas are made from dead organisms, like zooplankton and algae.
