In which sentence does the underlined word suggest the most positive connotation?
a. marigold was initially uncertain about her new laptop computer, but after a few weeks, she decided it was practical.

b. marigold was initially uncertain about her new laptop computer, but after a few weeks, she decided it was serviceable.

c. marigold was initially uncertain about her new laptop computer, but after a few weeks, she decided it was essential.

d. marigold was initially uncertain about her new laptop computer, but after a few weeks, she decided it was useful.