Answer:
B) GAINS, will enhance international efforts to collect and analyze laboratory samples from wild birds and identify genetic changes in the virus.
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.
