Which of the following algae reproduce by opposite mating filaments forming a cytoplasmic conjugate bridge to fuse cellular material?

A) filamentous green algae (Spirogyra)
B) sheet-forming red algae (Porphyra)
C) unicellular green algae (Chlamydomonas)
D) diatoms (Corethron)
E) foraminiferans (Globigerinella)