Refer to the Following Code Snippet and Identify the Use

Multiple Choice

Refer to the following code snippet and identify the use of the substring() and toLowerCase() methods. function pokerCard(cardSuit, cardRank) { … this.cardImage() = function() { var suitAbbr = this.suit.substring(0, 1) .toLowerCase() ; return suitAbbr + this.rankValue + ".p ng"; } }

A) To reset the text string in lowercase
B) To extract the last letter of the string in lowercase
C) To extract the first letter of the string in lowercase
D) To set the lowercase as default