$A$ message signal of $3 \text{ kHz}$ is used to modulate a carrier signal of frequency $1 \text{ MHz}$ using amplitude modulation. The upper sideband frequency and bandwidth respectively are:

• A
  $1.003 \text{ MHz}$ and $6 \text{ kHz}$
• B
  $0.997 \text{ MHz}$ and $6 \text{ kHz}$
• C
  $1.003 \text{ MHz}$ and $3 \text{ kHz}$
• D
  $1.003 \text{ MHz}$ and $2 \text{ MHz}$