You know that (a) is wrong, which eliminates A and D.

So you need to decide between B and C answers. Both suggest (b) and (d). Difference is: Which one to add along (b) and (d)? (e) or (f)?

(e) looks more promising for me - and I never studied for ISEB, even entry level :-)

You know that (a) is wrong, which eliminates A and D. Not sure why you thought it might be D: it shares wrong (a).

So you need to decide between B and C answers. Both suggest (b) and (d). Difference is: Which one to add along (b) and (d)? (e) or (f)?

So question is: why (e) and not (f):

• e. System testing environment has been tested and passed
• f. Static analysis has been performed and there are no outstanding issues

(e) looks more promising for me - and I never studied for ISEB, even entry level :-). Static analysis seems similar to 100% coverage; not a real executable test.