What openssl command will generate a private RSA key of 2048 bits and passphrase?

What openssl command will generate a private RSA key of 2048 bits and passphrase?

A.
openssl genrsa des3 out privkey.pem 2048

B.
openssl genrsa out privkey.pem 2048

C.
openssl genrsapass out privkey.pem 2048

D.
openssl genrsapass des3 out privkey.pem 2048