Explain the process of determining the Key Signatures with the use of the Circle of Fifths.​

In this work of art, which of the following can be observed? a. the artist painted the figures with elongated necks, legs, and arms. b. the figures are placed in a triangular shape, as geometric conventions were common in art during this time period. c. this piece is intended to represent the christian trinity. d. all of the above can be observed.