Among the important characteristics of market efficiency is (are) that:
i. there are no arbitrage opportunities.
ii. security prices react quickly to new information.
iii. active trading strategies will consistently outperform passive strategies.

I, II, and III.

Explanation:

Market efficiency demonstrates that prices mirror the entire information regarding a specific market or stock which is accessible at a given point of time. There are certain important characteristics of an efficient market which include a number of participants, uniformity in products, etc. As per the options, all the three options could be characterized as the important characteristics of market efficiency which are as follows:

I). 'There are no arbitrage opportunities' as there is complete awareness among the consumers regarding the availability of products and its prices.

II). 'Security prices react quickly to new information' as there is a consensus value of a product set by all the customers and sellers after assessing its value.

III). 'Active trading strategies will consistently outperform passive strategies' as there is perfect competition and therefore, there is a liberty to enter and exit the market at any point in time.

well since twins have about the same dna they dont have one think in common which is the figer print. nobodys fingerprint is the same. if your using twin you would most likely get around the same results for both of them because of the genetics.. i hope this

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.