Vectors require direction; scalars do not

Steps:

• Recall vectors have magnitude and direction (e.g., displacement), while scalars have only magnitude (e.g., energy).
• Analyze A: current × time equals charge, a scalar.
• Analyze B: final displacement - initial displacement equals change in displacement, a vector.
• Analyze C and D: work and kinetic energy are scalars from dot products or speed squared.

Why B is correct:

• Displacement is a vector; subtracting two vectors (final - initial) yields another vector via the vector subtraction formula.

Why the others are wrong:

• A: Charge (current × time) is a scalar quantity with magnitude only.
• C: Work done is a scalar, defined as force dot displacement.
• D: Kinetic energy (½ mass × speed²) is a scalar, using speed (magnitude of velocity).

Final answer: B