请教as a part of & as part of 的区别

As part of their therapy, young polio victims learning to live with their disabilities were helped to practice falling during the 1950s, so that they could learn to fall without being hurt.
(A) As part of their therapy, young polio victims learning to live with their disabilities were helped to practice falling during the 1950s
(B) As part of their therapy, young polio victims learning to live during the 1950s with their disabilities were helped to practice falling
(C) Young polio victims learning to live during the 1950s with their disabilities were helped to practice falling as part of their therapy
(D) Young polio victims learning to live with their disabilities were helped to practice falling during the 1950s as part of their therapy
(E) During the 1950s, as part of their therapy, young polio victims learning to live with their disabilities were helped to practice falling

The computer company has announced that it will purchase the color-printing division of a rival company for $950 million, which is part of a deal that will make it the largest manufacturer in the office color-printing market,

A) million, which is part of a deal that will make

B) million, a part of a deal that makes

C) million, part of a deal making

D) million as a part of a deal to make

E) million as part of a deal that will make

一道大全,一道JJ,想请教各位大侠,as a part of 与as part of 的区别在哪里?在google上搜了一些例句,单从可数与不可数的角度来看好像不是很清晰!如上两题,如分别改为as a part of their therapy和as part of a deal不知是否正确?

试试分析一下：）

be part of （对象是不可分的A role  responsibility, duty, or obligation; share） / as part of/ a part of (对象是可分的：An organ, member, or other division of an organism: A tail is not a part of a guinea pig)