Based on what we observed in the module on public finance, select all true statements. We observe a positive and constant trending behaviour of government expenditure over the 1960-2020 period when it is expressed as a percentage of GDP in Canada. We do not detect any difference in the spending behaviour between the Liberal and Conservative parties in Canada. Over the 1970-2020 period, the proportion of total expenditure allocated to collective consumption has increased in all industrial countries on average. None of the above