by herself or by her alone

[happys82]

Choose the appropriate pronoun:

Although Margaret has several assistants helping her, the biggest part of the research was done by .... alone.

a) her b) herself

 

[2006]

Choose the appropriate pronoun:

Although Margaret has several assistants helping her, the biggest part of the research was done by her alone.
'by herself alone.' would be redundant.
'by herself.' would also be correct.
a) her b) herself

2006