challenge: What is the primary purpose of the Nusantara-H1-A 16U cubesat launching with ViaSat-3 on a Falcon Heavy launch?
  
  A. To retain Ka- and Ku-band rights to a geostationary orbital slot
  B. To study the effects of microgravity on plant growth
  C. To test a new propulsion system for satellite maneuvering
  D. To conduct scientific experiments in space
  Answer: 