Which of the following are true of a diversified mutual fund?

a$.55\%$ or more of its assets are invested in cash, cash items, or securities

b$.$ Out of $75\%$ of its assets, more than $10\%$ holding of any company's voting securities are allowed

c$.$out of $75\%$ of its assets, a maximum of $5\%$ of its assets can be held in one company

d$.65\%$ or more of its assets are invested in cash, cash items, or securities