More than 50 new alien planets, including 16 super-Earths, which are potentially rocky worlds that are more massive than our planet, have been discovered by an exoplanet-hunting telescope. One in particular - called HD 85512 b - has captured astronomers' attention because it orbits at the edge of its star's habitable zone, suggesting conditions could be ripe to support life. The harvest of discoveries from the High Accuracy Radial velocity Planet Searcher instrument, or HARPS, has exceeded all expectations and includes an exceptionally rich population of super-Earths and Neptune-type planets hosted by stars very similar to our sun. And even better  the new results show that the pace of discovery is accelerating. HD 85512 b is the lowest-mass confirmed planet discovered by the radial velocity method that potentially lies in the habitable zone of its star, and the second low-mass planet discovered by HARPS inside the habitable zone.
Question: Planets that lie in their stars' habitable zone contain water.
Options:
A. true
B. false
C. uncertain
Answer: C