The passage points out that Noboru Takeshita would be Japan’s first Prime Minister with a humble rural origin.
This implies that the majority of previous Prime Ministers came from urban backgrounds, as Takeshita’s rural origin is highlighted as an unusual departure from the norm.
Option (a) — there is no evidence in the passage that most PMs were English educated. In fact, Takeshita avoided speaking English in public despite having taught it.
Option (b) — opposite of what is implied; rural origin is stated as exceptional, not common.
Option (d) — although Takeshita had been Finance Minister, the passage does not suggest that most Prime Ministers shared this role.
Thus, (c) is correct based on the logical inference from Takeshita’s unique background.