t cells bind to antigens that have been engulfed, digested, and presented on the surface of a(n)

Answer;

-Antigen presenting cells

Explanation;

-Helper T cell and inflammatory T cell TCRs recognise epitopes displayed by MHC class II molecules on the surface of antigen-presenting immune cells, including: macrophages that engulf foreign particles such as bacteria; dendritic cells that present antigen to T cells; and B cells that produce antibodies.

-Antigen-present cells APCs engluf antigens, present fragments of antigens to be recognized by T cells . Major types; dendritic cells in connective tissues and epidermis, macrophages in connective tissues and lymphoid organs &B cells.

True.

Here's a source (says right at the beginning of the video):

https://www.brightstorm.com/science/biology/cell-functions-and-processes/aerobic-respiration/