In this graph, which transformation can produce quadrilateral A'B'C'D from quadrilateral ABCD. A. a translation 4 units down and 3 units to the left.
B. a reflection across the line y= x
C. A reflection across the line y = -x
D. a 180 counterclockwise rotation about the origin

ILL MARK BRAINLIEST!!

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

Very hard to understand