What tool would be most effective in carrying out a detailed study of Venus's atmosphere ? A. Landing Craft
B. Telescope
C. Spectroscope
D. Space Probe

I believe the answer is C. Spectroscope

Explanation:

"To study the atmospheres of other planets and their moons, earthbound astronomers use a set of techniques called spectroscopy. Light is collected by a telescope and split into its component wavelengths, creating a spectrum."

HIPWAC - NASAhttps://ssed.gsfc.nasa.gov › hipwac › howitworks

answer called a epicycle;