What is an important difference between the European Court of Human Rights (ECHR) and the Court of Justice of the European Union (CJEU) in relation to their roles and functions?

What is an important difference between the European Court of Human Rights (ECHR) and the Court of Justice of the European Union (CJEU) in relation to their roles and functions?
A . ECHR can rule on issues concerning privacy as a fundamental right, while the CJEU cannot.
B . CJEU can force national governments to implement and honor EU law, while the ECHR cannot.
C . CJEU can hear appeals on human rights decisions made by national courts, while the ECHR cannot.
D . ECHR can enforce human rights laws against governments that fail to implement them, while the CJEU cannot.

Answer: B