There is lumber that is produced in 2020 but is not purchased by home builders just ends up sitting in the lumber yard unsold:

Select one:

a.when calculating GDP the lumber will go into inventory and are called consumption.

b.when calculating GDP will end up in inventory and are included in investment.

c.the lumber is are classified as intermediate goods and not added to GDP

d.the lumber will finally be included in depreciation when they are sold.