. The resistance stage in the general adaptation syndrome (stress response) is dominated by

A. anti-B antibodies in the recipient will agglutinate RBCs of the donor: A recipient with type A blood has anti-B antibodies in their plasma; those antibodies will react with the donor’s B antigens on AB RBCs causing agglutination/hemolysis.
B. anti-D antibodies in the donor will agglutinate RBC of the recipient: The donor is Rh-negative and therefore does not have D antigen or anti-D on their RBCs; donor plasma rarely contains anti-D in this context and donor RBCs cannot agglutinate recipient RBCs.
C. anti-A antibodies in the donor will agglutinate RBCs of the recipient: An AB donor does not have anti-A (or anti-B) antibodies in their plasma; moreover transfused RBCs (not donor plasma) are the main concern.
D. anti-B antibodies in the donor will agglutinate RBCs of the recipient: An AB donor has no anti-B antibodies; even if present, donor anti-B would act on recipient B antigens (which A recipient lacks), so this statement is wrong.

A. A chemical messenger that is triggered by the binding of a ligand on the cell surface and causes a change in DNA transcription: This describes how some hormones act inside a cell, but it is not the definition of a hormone.
B. A chemical messenger transported by the bloodstream that stimulates target cells in another organ often a good distance away: This is the textbook definition of a hormone: an endocrine signal transported in the blood to distant target organs.
C. Chemical messengers that travel across a synapse to stimulate another cell: This describes neurotransmitters, not hormones.
D. Chemical messengers that diffuse from their point of origin locally to affect other cells physiology: This describes paracrine or autocrine signals, not hormones.