instruction:
You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
question:
Category: SCIENCE & NATURE 
Clue: Developed by astronomer A.E. Douglass, dendrochronology determines age in this way
answer:
counting tree rings


question:
Category: SWEETS 
Clue: If you're looking for a chocolate bar chock full of peanuts, try this one introduced in 1925
answer:
mr. goodbar


question:
Category: ENDS IN "U" 
Clue: These Bantu-speaking people make up the largest language group in the Republic of South Africa
answer:

the zulu