Q. Point out the correct statement?

• (A) An environment is a collection of (symbol, value) pairs, i.e. x is a symbol and 3.14 might be its value
• (B) If the value of a symbol is not found in the environment in which a function was defined, then the search is continued in the child environment
• (C) After the top-level environment, the search continues down the search list until we hit the parent environment
• (D) Dynamic scoping turns out to be particularly useful for simplifying statistical computations