How does the Doppler method depend on the orbital inclination of a planet?

The Doppler method does not depend on the orbital inclination of a planet.

The orbital inclination will make the spectrum fainter.

The Doppler method only works for planets in orbits that are nearly face$-$on to us$.$

The Doppler method provides the true mass of the planet only if we know the inclination of the planet's orbit.

The Doppler method provides the true mass of the planet regardless of the inclinationHow does the Doppler method depend on the orbital inclination of a planet?

The Doppler method does not depend on the orbital inclination of a planet.

The orbital inclination will make the spectrum fainter.

The Doppler method only works for planets in orbits that are nearly face$-$on to us$.$

The Doppler method provides the true mass of the planet only if we know the inclination of the planet's orbit.

The Doppler method provides the true mass of the planet regardless of the inclination