Answer:
d. bad timing
Step-by-step explanation:
Remember the principle of first entry advantage which says that the first entrant to a market has better advantage of gaining more market share over late entrants.
This was true in the Tablet market which saw Apple's iPad been the very first commercially sold tablet devices. Because of wrong/late timing when Apple introduced its next-generation iPad2 the HP tablet came in struggling to get a part of the already captured tablet market by Apple's iPad.