The correct answer is C. Thrift. The correct spelling is "thrift".
A. Slight is spelled correctly. It means "small in amount, degree, or extent". B. Shoot is spelled correctly. It means "to propel (a projectile) from a weapon by the force of gunpowder or other explosive". D. Subtle is spelled correctly. It means "difficult to detect or perceive". E. All correct is not an option.