Which statement about behavioural effect is True?

a.

Investors are reluctant to sell stocks with "paper" losses-Mental Accounting

b.

Investors are slow to update their beliefs when given new evidence - Regret Avoidance

c.

Investors disregard sample size when forming views about the future from the past - Representation bias

d.

Investors are reluctant to bear losses due to their unconventional decisions -Conservatism bias