As a result of howard hughes sr.’s contributions to the petroleum industry — a) offshore drilling was safer b) oil drilling was possible through hard rock c) transportation of oil products was more efficient d) oil refineries were located exclusively in texas

The answer is B, oil drilling was possible through hard rock.

Explanation:

There are times when new advancements are proposed as being better methods for penetrating for oil and flammable gas. In any case, to see how these are better (or more probable not) than existing advances, you need to know how the business regularly bores through the shake. There are two fundamental methods for doing as such, contingent upon how hard the stone is. The first is the one that made the Hughes family exceptionally rich. The other, fairly slower, was created the last time that we had a vitality emergency, and utilization fake jewels, in the principle, to gouge into and rub off thin layers of shake.

when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.