AとBにはいるモノを選べという問題です。 英文↓ Between April and September this year, wild bears were spotted 13,670 times across Japan, the most over a six-month period in the last five years, data from the environment ministry showed. In many northern regions, the number of reported bear sightings reached the (A) in over a decade. There are multiple factors behind the (B) number of bear sightings,according to Shinsuke Koike, an associate professor of ecology at the Tokyo University of Agriculture and Technology. ちなみに答えは3なのですが、理由ががわかりません。どこから判断してますか？
英語
