[求助]OG12 SC 1 so

dollychow

.The Glass House Mountains in Queensland, Australia
,
were sighted in 1770 by the English navigator Captain
James Cook, bv whom they were named supposedly
because its sheer wet rocks glistened like glass.
(A)by whom they were named supposedly
because its

(B)by whom they were named supposedly and their

(C)naming them supposedly since their

(D)who so named them supposedly because their

(E)who so named it since supposedly their

答案是D。 请教一下 so 在这里的用法和意义

jeffery2541

so在这里是副词，修饰动词named，是“这样，如此”的意思。