Which Measure of Emotion Is Prone to the Following Methodological

Multiple Choice

Which measure of emotion is prone to the following methodological issues: high experimental demand, difficulty in using it across multiple cultures and age groups, and highly subjective?

A) Functional magnetic resonance imaging (fMRI)
B) Measures of autonomic nervous system, like pupillary dilation and skin conductance
C) Facial electromyography (EMG)
D) Language-based questionnaires