The best choice for viewing a highly detailed image of a virus attached to the surface of a cell would be:
b. transmission electron microscope
A transmission electron microscope (TEM) provides high-resolution images and is capable of visualizing the internal structures of cells and viruses at the molecular level. However, if the focus is on the surface of the cell and its interaction with the virus, a scanning electron microscope (SEM) could also be a good option, as it provides detailed three-dimensional images of surfaces. Thus, depending on the specific needs (internal structures vs. surface detail), both TEM and SEM can be suitable choices. But for the highest detail overall, TEM is preferred.