I attempted to get a travel insurance quote from Insure&Go but the promo code was "not known". I have since obtained travel Insurance with a different company that is also connected with Mitsui Sumitomo.
The question asked for the Head of State IN Australia. King Charles III is the Head of State OF Australia. The answer therefore is correct. One has to take note of the prepositions and the difference between "in" and "of".
The question specifically asked World War 1. Also if you refer to US entering WW2 in 1942, the bombing of Pearl Harbour was in Dec 1941 (11th I think but not sure) which precipitated the US's entry to WW2.
I was diagnosed with colon cancer when I was 37 years old in 1975. I again had it in 2012 and on neither occasion did I have chemo or radiation. This was because it was caught before any cells showed as being affected. I am now 85 and have an ileostomy, which I hate, but I guess it is better...