Christopher Columbus is important to learn about beacuse Question 2 options:

A. He connected the Americas to Europe and Africa by sea.

B. He was very gernerous to the natives he encountered

C. He never realized that he hadn't made it to Asia

D. He made England rich and powerful

Answer (d) may increase or decrease porosity through dissolution or deposition;

Conflicts arising from drug cartels and goverment corruption is an issue that would most likely be considered as mexico's most challenging problem of today. the correct option among all the options that are given in the question is the third option or option "c". this problem has continued for a very long time.

Think it's d

A: buys very few of because that's the way they can get through customs.