Which statement is true regarding the Dow Jones Industrial Average?

Question $8$ options:

a$)$

It is a price$-$weighted average of $100$ large stocks traded on the New York Stock Exchange.

b$)$

It is a value$-$weighted average of $30$ large industrial stocks.

c$)$

It is a value$-$weighted average of $30$ large industrial stocks.

d$)$

It is a value$-$weighted average of all industrial stocks traded on the New York Stock Exchange.