Read the stanza given below and complete the sentences by choosing the appropriate option.

Day by day the nightingale
Grew more sorrowful and pale
Night on night her tired song
Zipped and trilled and bounced along,
Till the birds and beasts grew tired
At a voice so uninspired
And the ticket office gross
Crashed, and she grew more morose
For her ears were now addicted
To applause quite unrestricted,
And to sing into the night
All alone gave no delight.

The nightingale was sorrowful and pale because she………………..

(i) had been practising in the rain

(ii) had been performing all night

(iii) was losing confidence in herself

(iv) was falling ill