Which sequence correctly describes the procedure for shifting from first to second in a manual transmission?

Answer: A — Clutch pedal down, shift, accelerator pedal up

Shifting smoothly from first to second comes from coordinating the clutch, the gear shift, and the throttle. Press the clutch all the way down, move the gear lever into second, and then gradually release the clutch while applying some throttle with the accelerator. This keeps engine speed and drivetrain speed matching, so the shift is gentle and you don’t stall or jerk. If you shift without using the clutch, or you release the throttle too early or too late, the engagement will be rough or cause a stall. The key is a smooth, coordinated hand-foot action: clutch down, shift, then accelerator as the clutch comes up.