Suppose that you declare two String objects as:

Program code. In the code, the words in the variable names are merged. Line $1.$ String, space, word $1,$ space $=$ space, new, space, string, left parenthesis, open quotes, happy, close quotes, right parenthesis, semicolon. Line $2.$ String, space, word $2,$ semicolon.

The value of word$1.$equals$($word$2)$ is $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.$

a$.$ true

b$.$ false

c$.$ illegal

d$.$ unknown