Among the following words, the choice that you need to double the final consonant before adding the suffix to the base word is, shop + -er. The word shop plus -er becomes shopper with the double consonant p. The rule applied here is that, if the word is only one syllable and ends in a vowel and consonant, double the last letter before the vowel suffix.
Andrea because she is the most focused. Tom is acting either immature which is not a good quality in a leader. Whilst Joe is not confident and is acting shy which is also not a good quality for a leader.
