Which of the following XML documents are well-formed?

A. <firstElement>some text goes here

<secondElement>another text goes here</secondElement>

</firstElement>

B. <firstElement>some text goes here</firstElement>

<secondElement> another text goes here</secondElement>

C. <firstElement>some text goes here

<secondElement> another text goes here</firstElement>

</secondElement>

D. </firstElement>some text goes here

</secondElement>another text goes here

<firstElement>

Ans: B