How does ion composition of pre- urine differ from hemolymph?

A) Hemolymph is higher in osmolarity, conserving its Cl^- .
B) Pre- urine is significantly higher in osmolarity especially with respect to Na⁺ and K⁺).
C) The protein pumps and channels of the Malpighian tubules concentrate Cl^- in the pre- urine.
D) Pre- urine is similar to hemolymph in ion composition.