gmatFalcon
The Olympic Games did not have their first corporate sponsor until 1928, when the games in Amsterdam were supported by Coca-Cola, the soft drink company, which is also credited with having popularized the modern image of Santa Claus and having pioneered the use of product placement in movies.
A. which is also credited with having popularized the modern image of Santa Claus and having pioneered the use of product placement
B. which, while popularizing the modern image of Santa Claus, pioneered the use of product placement
C. which, after being credited with popularizing the modern image of Santa Claus, pioneered the use of product placement
D. which is also credited with popularizing the modern image of Santa Claus, pioneering the use of product placement
E. popularizing the modern image of Santa Claus and pioneering the use of product placement
as per the regular qn meaning, cocacola sponsored x and cocacola is also a and b
so out of all options B,C,D,E ,every options presents either cause and effect relationship or a how aspect of the meaning, whereas no such hint being provided in the qn statment or can be inferred from the meaning of such relation ship.so without doubt I go for A .
Sources are comma+ing modifier and its rules.its a meaning based approach.