What is a reason the European Court of Justice declared the Data Retention Directive invalid in 2014?

What is a reason the European Court of Justice declared the Data Retention Directive invalid in 2014?
A . The requirements affected individuals without exception.
B . The requirements were financially burdensome to EU businesses.
C . The requirements specified that data must be held within the EU.
D . The requirements had limitations on how national authorities could use data.

Answer: D

Explanation:

Reference: https://www.loc.gov/law/help/eu-data-retention-directive/eu.php#:~:text=In%20April%202014%2C%20the%20Grand,proportionality%20in%20forging%20the%20Directive.