In general, when comparing standard costs with budgeting, it can be said that

a$)$ Standard costs are more detailed than budgets and they can provide more timely feedback on performance

b$)$ Standard costs and budgets cannot both be used by an organization

c$)$ Standard costs work well in manufacturing firms, but budgeting does not

d$)$ Flexible budgeting and standard costs are fundamentally the same thing

All of the answers above are correct