请教：大全 Sec19 -5

                             Legend has it that when the Mohawk Joseph Brant was presented to George III in 1776, he proudly refused to kiss the King’s hand, inasmuch as he regarded himself an ally, not a subject.fficeffice" />

(A) as he regarded himself an ally, not

(B) that he regarded himself to be an ally rather than

(C) as he considered himself an ally, not

(D) that he considered himself to be ally instead of（C）

(E) as he considered himself as an ally rather than

答案是C。题目不是很看得懂，能否帮忙翻译以下，特别是inasmuch这里。另外，regard和consider有啥区别呢？A为什么不对，多谢！