TOEFL Reading: ETS-TOEFL阅读机经 - 2NLI88KYQV6QJRILL$

According to paragraph 6, how does the yamase effect cause lower yields in rice cultivation in the north of Honshu? A. It can result in declining temperatures which are too low for successful rice production. B. It can decrease summer rainfall levels, thus causing insufficient levels of water for rice production. C. It can harm a great deal of the land necessary for farming. D. It can potentially inhibit rice production in seasons other than summer.