The carrying amount of PPE has reduced by 10,000 following the disposal of one item of machinery. Which of the following statements relating to the disposal could be true? O a. Disposal proceeds were 5,000 and the carrying amount of the machinery sold was 5,000 O b. Disposal proceeds were 15,000 and the gain on disposal 5,000 O c. Disposal proceeds were 15,000 and the carrying amount of the machinery sold was 5,000 O d. Disposal proceeds were 15,000 and loss on disposal was 5,000