What does R code nv <- v[v < 1000] do?

A.
Selects the values in vector v that are less than1000 and assigns them to the vector nv

B.
Sets nv to TRUE or FALSE depending on whether allelements of vector v are less than 1000

C.
Removes elements of vector v less than 1000 and assigns the elements >= 1000 to nv

D.
Selects values of vector v less than 1000,modifies v,and makes a copy to nv