Answer :
She needs to B. acknowledge the sources of the images
Why ?
As it is stated on the creativecommons . org :
"Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits."
