请教问题补充材料316,366！！！

halcyon · 发表于 2003-12-1 00:25:00

316。 Intended primarily to stimulat summer travel, the new airfare, which allows both an adults and a child to fly for the price of one ticket, and also shortens the advance-purchase requirement for family travel to a minimum of seven days rather than fourteen.
c. also shortens the advance-purchase requirement for family travel to a minimum of seven days rather than that of fourteen.
e. also shortens the advance-purchase requirement for family travel to a minimum of seven days rather than fourteen.

答案为e, 请问c的that of 为什么不对，that 不可以指代 a minimum 吗？
另外，平行结构的介词什么情况下省略，如上面的e ， a minimum of seven days rather than of fourteen 可以吗？
for A and for B, 在什么情况下可以省略为 for A and B.

366. The suspect in the burglary was advised of his right to remain silient, told he could not leave, and was interrogated in a detention foom.
B. of his right to remain silient, told he could not leave, and
D. that he had a right to remain silent, could not leave, and was
答案为B, 但是told 后面的宾语从句为什么不用 that 引导，
而且可能引起歧义：he could ... and interrogated..., 同时 told 前面缺少 and .
我觉得D 更符合平行结构 had..., could not..., and was... .

bluestone1 · 发表于 2003-12-1 00:40:00

366
从句义看

advised of his right to remain silient
told he could not leave
and interrogated in a detention room

三句是并列关系

bluestone1 · 发表于 2003-12-1 00:46:00

316
a minimum of seven days rather than of fourteen 可以吗？

我觉得要补出 days, 即a minimum of seven days rather than of fourteen days

但即使这样也不如 a minimum of seven days rather than fourteen 简单明了而且无歧义

请教问题补充材料316,366！！！