Question: Which properties of the mRNA does N6-methyladenosine (m6A) affect?

Context:
N(6)-methyladenosine (m6A) is the most abundant modified base in eukaryotic mRNA and has been linked to diverse effects on mRNA fate.
m(6)A predominantly and directly reduces mRNA stability, including that of key naïve pluripotency-promoting transcripts. 
Recent discoveries of reversible N(6)-methyladenosine (m(6)A) methylation on messenger RNA (mRNA) and mapping of m(6)A methylomes in mammals and yeast have revealed potential regulatory functions of this RNA modification
Monitoring m6A levels upon WTAP depletion allowed the definition of accurate and near single-nucleotide resolution methylation maps and their classification into WTAP-dependent and -independent sites. WTAP-dependent sites are located at internal positions in transcripts, topologically static across a variety of systems we surveyed, and inversely correlated with mRNA stability, consistent with a role in establishing "basal" degradation rates.
Methylations of adenosine residues (m6A) in pre-mRNA are important for formation of late simian virus 40 mRNAs
The data argues for a role of internal m6A moieties in modulating the processing-linked transport of mRNA from the nucleus to the cytoplasm of nontransformed cells. 
N6-Methyladenosine (m6A) residues, which are found internally in viral and cellular mRNA populations at the sequences Apm6ApC and Gpm6ApC, have been proposed to play a role in mRNA processing and transport.
The role of Fat Mass and Obesity-associated protein (FTO) and its substrate N6-methyladenosine (m6A) in mRNA processing and adipogenesis remains largely unknown.
N6-methyladenosine (m6A) is a common modification of mRNA with potential roles in fine-tuning the RNA life cycle.
The results of that study and of experiments using inhibitors of methylation suggest that m6A might be involved in mRNA processing events. 
Previous studies suggested that m6A affects the efficiency of mRNA processing or transport, although the mechanism by which this occurs is not known. 
 The methylation of internal adenosine residues in eukaryotic mRNA, forming N6-methyladenosine (m6A), is catalyzed by a complex multicomponent enzyme. Previous studies suggested that m6A affects the efficiency of mRNA processing or transport, although the mechanism by which this occurs is not known.
Previous studies suggested that m6A affects the efficiency of mRNA processing or transport, although the mechanism by which this occurs is not known. As a step toward better understanding the mechanism and function of this ubiquitous posttranscriptional modification, we have shown that HeLa mRNA (N6-adenosine)-methyltransferase requires at least two separate protein factors, MT-A and MT-B, and MT-A contains the AdoMet binding site on a 70-kDa subunit (MT-A70).
The methylation of internal adenosine residues in eukaryotic mRNA, forming N6-methyladenosine (m6A), is catalyzed by a complex multicomponent enzyme. Previous studies suggested that m6A affects the efficiency of mRNA processing or transport, although the mechanism by which this occurs is not known.

Answer: N(6)-methyladenosine (m6A) is the most abundant modified base in eukaryotic mRNA and has been linked to diverse effects on mRNA fate. m6A predominantly and directly reduces mRNA stability.
Exact answer: mRNA stability