Which statement best compares pseudopods in sarcodina and flagella in dinoflagellates?

a.
pseudopods are whip-like structures, while flagella are flat structures involved in photosynthesis.
b.
both pseudopods and flagella are used for movement, but only pseudopods are used to engulf food.
c.
both pseudopods and flagella are used for reproduction, but only flagella are used for movement.
d.
pseudopods are permanent projections from a cell, while flagella can be retracted into the cell.