Clear my choice The exchange rates between the Australian dollar and the US dollar were as follows: 1 Jun 1 1SAUS= $.71US Jul 1 1$AUS-$.73US Aug 1 1SAUS $.79US Sep 1 1$AUS $.83US This chart shows a: Select one: Oa. Strengthening Australian Dollar which makes it less expensive for Americans to buy Australian goods. O b. Weakening Australian dollar which makes it less expensive for Americans to buy Australian goods. Oc. Strengthening Australian dollar which makes it more expensive for Americans to buy Australian goods Od. Weakening Australian dollar which makes it more expensive for Americans to buy Australian goods.