Final answer:
Most exoplanets detected are Jupiter-sized or larger, and have very long orbital periods. option c is answer
Step-by-step explanation:
Most of the exoplanets that have been detected are Jupiter-sized or larger, and have very short orbital periods. This is based on findings from the Kepler telescope, which was primarily responsible for discovering a range of exoplanets, including those much smaller than Earth and substantially larger than Jupiter, with a notable absence of discoveries of long orbital period exoplanets due to the mission's 4-year lifetime.
Kepler's discovery space was thus limited to detecting exoplanets with orbital periods less than 400 days and sizes larger than Mars. Furthermore, the data indicates that the most common exoplanets detected by Kepler have radii between 1.4 and 2.8 times that of Earth, known as super-Earths, and those between 2.8 and 4 times Earth's radius are often called mini-Neptunes. option c is answer