Final answer:
Emotional blackmail allows Sanford to sexually seduce Eliza.
Step-by-step explanation:
The correct answer is d) Emotional blackmail. Emotional blackmail involves manipulating someone's emotions and using guilt or fear to get them to do something against their will. In this case, Sanford is using emotional manipulation to seduce Eliza, taking advantage of her feelings and emotions.
Verbal persuasion techniques, psychological manipulation, and physical coercion are not appropriate or ethical methods for seduction, and they violate the principles of consent and personal boundaries.