Which statement is true about a complement in grammar? A. It must be part of a prepositional phrase. B. It helps to complete the meaning of a verb. C. It is always located before the linking verb in a sentence. D. It is an adverb that modifies an action verb.

The Langley Research Center (LaRC or NASA Langley), located in Hampton, Virginia near the Chesapeake Bay front of Langley Air Force Base, is the oldest of NASA's field centers. LaRC has focused primarily on aeronautical research but has also tested space hardware such as the Apollo Lunar Module. In addition, many of the earliest high-profile space missions were planned and designed on-site. Langley was also considered a potential site for NASA's Manned Spacecraft Center prior to the eventual selection of Houston, Texas.

Established in 1917 by the National Advisory Committee for Aeronautics (NACA), the research center devotes two-thirds of its programs to aeronautics and the rest to space. LaRC researchers use more than 40 wind tunnels to study and improve aircraft and spacecraft safety, performance, and efficiency. Between 1958 and 1963, when NASA (the successor agency to NACA) started Project Mercury, LaRC served as the main office of the Space Task Group.

In September 2019, after previously serving as associate director and deputy director, Clayton P. Turner was appointed director of NASA Langley

yes i plucked it straight from wiki but it should work