2 and 3 are too similar to distinguish because they both are saying it's been back up on several different accounts but 3 seems like a more solid answer go with 3
<span><span><span>Element symbol Element name Ion symbol Cl chlorine Cl1-</span>Anion name chloride ion</span><span><span>Br bromine Br 1-</span>bromide ion</span><span><span>O oxygen O2-</span><span>oxide ion, can u make this the brainliest</span></span></span>
The only answer that could be considered an advantage is C. Increasing the amount of crops harvested.
Number 10 is A and Number 11 is B