His wife works for the company, the Breakfast Group, so

'And also' is almost everytime wrong. But here it is exception, because and also is used for the same person/same thing. If you see 'and also' used for different person and/or for different thing then it is wrong usage. B is correct here.

A) works for the company, the Breakfast Group, so named because during the early years, Eric worked until breakfast, and is also a chartered accountant
>>>> Misplaced modifiers
B) is a chartered accountant and also works for the company, the Breakfast Group, so named because during the early years, Eric worked until breakfast
>>> Sounds OK
C) also works for the company and is a chartered accountant, the Breakfast Group, so named because during the early years, Eric worked until breakfast
>>>>> we generally say ...he does this and also this ....so "also" is misplaced here.
D) is also a chartered accountant for the Breakfast Group, so named because during the early years, Eric worked until breakfast, and works for the company
>>>>> we generally say ...he does this and also this ....so "also" is misplaced here and ofcourse misplaced modifier at the end which is confusing.
E) works for the company, the Breakfast Group, so named because during the early years, Eric worked until breakfast, where she is a chartered accountant
>>>> "where" is modifying the company here and hence it is misplaced.

I got this one wrong, choosed D but carefully looking at above comments i agree with B.

Nice explainations. OA is B.

Two characteristics of wife are given - she is a CA and works for company, the BG grp...[then modifier for the BG grp is given]

+1 B

The modifiers follow the "touch rule", the modifiers should "touch" the nouns they modify.

its B using the modifier rule here.

B! Proper placement of the modifiers.