A financial services company is developing a new mobile banking application. They want to ensure that all communications between the app and their servers are protected against eavesdropping and tampering. Which combination of CIA triad principles and methods should they prioritize to achieve this goal?

A$)$ Confidentiality through encryption and Integrity through digital signatures

B$)$ Availability through load balancing and Confidentiality through data masking

C$)$ Integrity through hashing and Availability through redundancy

D$)$ Confidentiality through access control and Availability through backups