The correct characteristics that apply to Egyptian mummy portraits of the Greco-Roman Era are:
- They were made on metal plates using the encaustic technique.
- They were done in realistic Greek style rather than using Egyptian formulas.
- They were done in a Greek style of painting, showing people in Roman fashion.
The first option regarding shrouds showing the dead surrounded by Egyptian gods does not specifically describe the mummy portraits themselves but rather the shrouds that sometimes accompanied the mummies. Hence, it is not applicable to the mummy portraits specifically.