What are the cytoplasmic threads that pass through openings in neighboring cell walls called?

Explanation

Pseudopods (A) are temporary projections of the cell membrane used for movement. Symplasts (B) refer to the interconnected cytoplasm of plant cells but not the strands themselves. Pili (D) are hair-like structures found on bacterial cells. The correct term for cytoplasmic strands that traverse cell wall pores is plasmodesmata (C).