Read this sentence from Paragraph 1 of the passage. Forty-seven years ago one of these Calaveras King Sequoias was laboriously cut down, that the stump might be had for a dancing-floor.

Then read this dictionary entry.

laboriously adv. 1. with great attention to detail; 2. with excessive effort; 3. without spontaneity

What does the word laboriously mean in the sentence from the passage?

1. with difficulty

2. with accuracy

3. in a dull manner

4. in a simple manner