1) What are the keywords used in the modelling language to define resources? (MULTIPLE CORRECT ANSWERS POSSIBLE)

A) optional

B) default

C) concepts

D) identity

PLEASE ANSWER ONLY IF YOU ARE SURE AND GIVE EXPLNAATION

2) Which is of the following will cause non determinism in the smart contract? (MULTIPLE CORRECT ANSWERS POSSIBLE)

A) By using timestamps in the smart contract

B) By using counters in the smart contract

C) By using global variables in the smart contract

D) Only reading and updating ledger values.