The correct answer is option (A):
chatter
The correct answer is "chatter" because it's a synonym for the word "natter". Natter means to talk at length, often about unimportant things. Chatter also means to talk quickly and continuously, often in a trivial way. The other options, "scaner," "batter," and "tatter," do not have a related meaning to "natter" or have completely different meanings. Therefore, "chatter" is the word that best reflects the meaning of "natter".