Answer:
A photograph of Maria in her work clothes with smiling face
Step-by-step explanation:
Maria is an individual or person, who works as designer in the design department of a company. Being a designer, her work involves creativity in her designs which attract the customers.
And she wants her online presence to signal or state that by profession she is a business professional in order to choose a profile picture for her online presence, she needs to choose a photograph, in which she is wearing her work clothes along with a smiling face.