Plasma contains special proteins that form the complement system.

More than 30

Explanation:

Over 30 proteins and protein fragments make up the complement system, including serum proteins, and cell membrane receptors. They account for about 10% of the globulin fraction of blood serum.

C) more than 30

Explanation:

The complete question is:

Plasma contains special proteins that form the complement system.

A)roughly 18  B)exactly 10  C)more than 30   D)about 3    E)exactly 25

Complement system is sytem of plasma protiens that can be activated by pathogen or pathogen bound antibody to fight the infection

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

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